Soldering-furnace.



E. T. BURGESS.

SOLDERING FURNACE.

APPLICATION FILED APR. 27. 1912.

1,075,757, Patented Oct. 14, 1913.

COLUMBIA PLANOGRAPH co., WASHINGTON, n. c.

EDWARD T. BURGESS, OF COLUMBUS, OHIO.

SOLDERING-FUIRNACE.

Specification of Letters Patent.

Patented Get. 11a, 1913.

Application filed April 27, 1912. Serial No. 693,713.

To all whom it may concern Be it known that I, EDWARD T. BURGESS, a citizen of the United States, residing at Columbus, in the county of Franklin and State of Ohio, have invented certain new and useful Improvements in Soldering-Furnaces, of which the following is a specification.

My invention pertains to soldering furnaces and is particularly applicable to that type of furnace known as a soldering furnace.

The primary principle of my invention resides in the provision of a structure of furnace wherein the fuel conducting conduit is heated for the vaporization of the fuel prior to its delivery to the burner, but, particularly, my invention rests in the provision of a means for heating the fuel conducting conduit at the proximate point of admission of the fuel to the burner. In the effectuation of this result, I desirably utilize a pilot flame which is normally maintained for the purpose of lighting the burner at any time and which while being maintained, effectually heats the fuel conduit near the juncture thereof with the burner.

My invention further relates to the provision of means for insuring-the lighting of the burner from the'pilot flame and in the particular construction producing this result, I desirably arbitrarily control the path of the pilot flame and so direct it as to insure an effective and instantaneous lighting action. In the preferred embodiment of my invention, I utilize an intermediate or supplemental pilot flame element, which is in the nature of gas emitting passages disposed at a point intermediate the pilot flame and the burner and in operative relation to both.

A further description of the objects of my invention will be set forth in connection with the description of the preferred form thereof which is shown in the accompanying drawings, in which similar characters of reference designate corresponding parts, and in which:

Figure 1 is an end elevation of the burner structure comprising the essential part of my invention, Fig. 2 is a plan view of a casting element preferably forming a part of my furnace structure and comprising a priming cup and the intermediate or supplemental pilot port structure, Fig. 3 is a side elevation of the structure shown in Fig.

2, Fig. 4 1s a plan View of my lmproved furnace structure, and, Fig. 5 is a longitudinal section of the structure shown in Fig. 4.

In the drawings, there 18 shown a furnace base 1 which is adapted to have a tank disposed at one end for retaining fuel preferably under pressure, such tank not being shown, and which carries at its opposite end the burner structure. This burner structure is desirably formed with a framework 2 preferably of substantially rectangular formation and having the inner faces of its end walls provided with annular shelf members 3 and 4 for the support of the burner 5 which is preferably of substantially cylindrical formation, but being provided upon its upper surface with a rectangular portion 6 desirably integrally formed therewith and having a series of side slots 7 and a top slot 8. The rectangular formation 6 is preferably braced and divided at intervals by partition members 9. This framework 2 likewise has its outer end Wall bored as at 10 for the reception of a tubular member 11 forming a conduit for the passage of emitted fuel toward the rear of the burner. This end wall of the framework 2 is also provided with apertures 12 and 13 for a purpose to be hereinafter described, it being only necessary to note at this point that the aperture 12 is in communication with the interior of the burner cylinder, whereas the aperture 13 extends to a point adjacent the exterior of one nose of the rectangular formation 6 of the burner. Furthermore, the framework 2 is provided upon its front and rear walls with shelves 14c and 15, the shelf 15 being slotted as at 16, it being of importance to note at this point that the slot 16 is of a predetermined length and does not extend entirely through the shelf 15.

Mounted upon the outer face of the outer end wall of the framework 2 is a casting similar to that shown in Figs. 2 and 3 and desirablycomprising a plate 17 having screw holes 18 and 19, a port 20, and apertures 21 and 22. This plate 17 is preferablyspaced for the greater portion of its area from the end wall of theframework and is provided at an upper central point thereof with a pocket formation 23 which covers and is fed by the hole 12 in the end wall of the frame work 2. I This pocket formation is preferably provided with slots 24' in its forward face and slots 25 in its upper surface. The slots 25 are designedly in ]uXtapos1t1on to the. aperture 13. The outer face of the plate 17 is further peculiarly curved as at 26 for a definite operationin conjunction with the priming cup mounted thereon to be presently described.

Leading from the fuel reservolrs 1s a fuel conduit 27 which is desirably conducted over the burner 5 and in superposed relation to the slotted formation 6. At its outer en this conduit 27 is joined to a depending L-shaped extension 28 having a horizontal leg 29 supported by a strap 30 secured in place by a screw 31 extending into the aperture 21. Near the upper end of the L- shaped depending portion 28 is an integral flange 32 which ts beneath the slot 16in the shelf 15 and further partially closes the same. Below this flange 32 the vertical leg of the L-shaped depending member carries a nipple formation 33 in alinement with the outer end of the tubular member 11 and under the control of a valve 34 having a stem 35 and a handle 36; This nipple formation is completed by a cap 37 and packing 38 maintained in proper degree of compression by said cap. It will be understood that this nipple 33 is the means for discharging fuel into the tubular member 11 and that it is controlled by the valve 3 1-. At the elbow of the L-formation or more specifically at the point where the horizontal leg joins the vertical leg, there is a further small port 39 which is under the control of a needle valve 40 having a handle 41. It will be understood that the operation of this handle serves to open or close the port 39.

Carried by the casting element shown in Figs. 2 and 3 is a priming cup 4-2 which is of peculiar formation and which is supported at one side by screws 43. This prim ing cup is of a channel form, but in general contour is substantially L-shape. The chan nel formation of the base thereof may vary, but it is desirable that the vertical leg of this priming cup be inclined inwardly and upwardly toward the pocket formation 23 from a point approximately designated by the arrow. Furthermore, it is also of importance for a highly eflicient working of my invention, although not absolutely neces sary, for the said vertical leg of the priming cup to gradually narrow in its approach to the said pocket formation. This form described in conjunction with the curve of the wall of the plate 17 at 26, serves as a guideway for a pilot flame issuing from the port 39.

The operation of the structure thus far described is as follows: Assuming that it is desired to start the furnace initially the valve 40 is operated to permit the fuel to flow into the priming cup, whereupon the fuel may be ignited through the medium of a port 44L. After this ignition, the fuel in the priming cup will burn until the depending L-shaped portion 28 is heated sufliciently to vaporize the fuel contained therein. During this burning of the priming fuel the valve 40 may be maintained closed or open. If it is open the fuel issuing therefrom will shortly be transformed into a vapor and produce that which I have termed a pilot flame; or if desired, the valve 40 may be ,closed during the heating of the depending L-shaped portion. When the fuel in the depending L-shaped portion has been sufliciently vaporized, the valve 34 is opened .andthe fuel passes into the tubular formation 11 to the rear of the burner cylinder 5. In a short period the fuel will pass through the aperture 12 into the pocket 23 and will be discharged through the ports 24 and 25. If the valve 40 has been left open and the pilot flame is burning, the fuel issuing from the ports 24: in the form of a gaseous vapor will be ignited from this pilot flame. If the valve 40 has been closed, it may be necessary to open this valve, whereupon the vaporized fuel emitted therefrom is ignited to form a pilot flame. At any rate, if the pilot flame is in operation, it will be guided by the walls of the priming cup to a point where it will ignite the vaporized fuel issuing from the ports 24. Too great a scattering of this discharging vaporized fuel will be precluded by the flange 32, so that ignition at this point will be insured. The immediate result of this ignition, will be the ignition of the vaporized fuel being emitted from the ports 25 and this flame is protected by the portion 45 of the shelf 15 which like wise prevents dispelling of the emitted fuel. In the meantime, the bulk of the vaporized fuel will have passed into the formation 6 and will be discharging from the slots 7 and 8. Through the medium of the aperture 13, the flame at the ports 25 will ignite the fuel being discharged from the burner and continued operation of the burner will direct a flame against the conduit 27 and further vaporize the fuel. When it is desired to eX- tinguish the furnace, it is frequently desired to maintain it in condition for ready ignition, thereby rendering it unnecessary to utilize the priming cup at each starting of the furnace. In this resides one of the important features of my invention, since I attain this result simply by maintaining the posed on the conduit 27 between the end wall of the burner and the nose of the rectangular formation.

It will be apparent that I have provided a soldering furnace wherein the fuel is vaporized thoroughly before its admission to the burner, by the provision of a supplemental heater as well as by the subjection of the conduit to the heat of the burner, and that the said supplemental heating device is likewise utilized as a pilot flame. In addition to this, I have insured conduction of the pilot flame to a point to ignite the burner readily, even though the pilot flame may be disposed without the rectangular frame of the furnace as is customary.

What I claim, is

1. A soldering furnace comprising a burner, a fuel supply conduit, an element connecting said conduit and said burner, a valve structure for said burner carried by said element, a pilot light valve structure carried by said element, and a priming cup beneath said element and constructed to intercept and upwardly direct the flame from said pilot light valve.

2. A soldering furnace comprising a burner, a fuel sup ly conduit, a right angular element formec of a vertical and a horizontal leg connecting said conduit and said burner, a valve structure for said burner carried by the vertical leg of said element, a pilot light valve structure carried by the horizontal leg of said element, a priming cup beneath the horizontal leg of said element, and an extended upwardly directed wall on said cup against which the pilot light valve structure is adapted to direct a flame to cause it to be deflected.

3. A soldering furnace comprising a burner, a supply conduit for said burner, a valve structure for said burner, a pilot light valve structure, a priming cup beneath said last valve structure, and an extended upwardly directed wall on said cup against which said pilot light valve structure is adapted to direct a flame to cause it to be deflected.

4. A soldering furnace comprising a burner, a framework surrounding said burner, a casting of pocket form carried by the front of said framework and in communication with said burner through an aperture in the framework, said casting having slots in its front and top walls, the front wall of said framework being provided with another aperture forming a continuation of the slot in the top wall of said casting, a valve structure for said burner, a pilot light valve structure, and means for directing the flame from said pilot light valve in proximity to the slots in the side of said casting.

5. A soldering furnace comprising a burner, a framework surrounding said burner, a casting of pocket form carried by the front of said framework and in communication with said burner through an aperture in the framework, said casting having slots in its front and top walls, the front wall of said framework being provided with another aperture forming a continuation of the slot in the top wall of said casting, a valve structure for said burner, a pilot light valve structure, a priming cup beneath said pilot light valve structure, and an extended upwardly directed end wall on said priming cup against which the pilot light valve is adapted to direct a flame to cause it to be deflected toward the slots in the side of said casting.

In testimony whereof I afix my signature in presence of two witnesses.

EDWARD T. BURGESS.

Witnesses C. C. SHEPHERD, WALTER E. L. BooK.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

Washington, D. C. 

